Hello,
sorry, I only speak a little german so I write in english. I am a motovespa entusiaust from Madrid. Had in the past an orange GT, a white Pk125xl, a black T5, none with autolube or elestart. Now I have a black 1987 PX200E iris elestart (all elestart have autolube) and a blue 1970 160. What I learnt from MV in 30 years is that it is almost impossible to find the same parts in the same series. The production systems in the 70´s and 80´s (the golden years of MV) were far from Just In Time. They produced as much as they could. If in a moment a part was out of stock, it was replaced with what they had on hand (seats, mirrors, badges, exhaust, cables,..... whatever). On the other hand there were complete engines said to come from Italy. Z.b. my PX220E, having ducati ignition and flywheel, but a MV number stamped in the engine...
Also there was the overstock of some pieces. As you know, MV TX200 was born to "get rid" of T5 frames. T5 sales were poor: it was sporty but not reliable as basic Iris 200, the bestseller (w/o autolube). Same solution with any other surplus part. You can find many units of the same series with diferent parts. So don't be mad trying to find the real OEM part for your MV´S.
In your case, I would say you own a "spanish made in Italy scooter". MV T5 production as far as I know began by 1987.
Good rides for you, regards from Madrid.